CN108483621B - Optimal region for determining multi-stage water inlet process of sewage treatment and adjusting method - Google Patents
Optimal region for determining multi-stage water inlet process of sewage treatment and adjusting method Download PDFInfo
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- CN108483621B CN108483621B CN201810343613.3A CN201810343613A CN108483621B CN 108483621 B CN108483621 B CN 108483621B CN 201810343613 A CN201810343613 A CN 201810343613A CN 108483621 B CN108483621 B CN 108483621B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
Abstract
The invention discloses a method for determining an optimal region and adjusting a multi-stage water inlet process for sewage treatment, which comprises the following steps: measuring the concentration of the activated sludge to be measured, and carrying out respiratory map test to respectively obtain 5 oxygen consumption rates: OURs, OURq, OURe, OURen, and OURenc; determining the minimum value of non-aerobic hydraulic retention time, the minimum value of heterotrophic bacteria oxygen consumption rate and the minimum value of autotrophic bacteria oxygen consumption rate in different multi-section water inlet processes; the method is used for drawing software to make a relation graph; dividing the relational graph into different areas; and determining the area meeting the conditions as an optimal area for sewage treatment, and adjusting the oxygen consumption rate of heterotrophic bacteria and the oxygen consumption rate of autotrophic bacteria to be close to the optimal area through the change of the non-aerobic hydraulic retention time. The method can adjust the operation parameters according to the oxygen consumption rate, improve the treatment efficiency and provide a feasible method for optimization, stable operation, energy conservation, consumption reduction and the like of a sewage treatment plant.
Description
Technical Field
The invention belongs to the field of sewage treatment, and relates to a method for obtaining an optimal working condition area of a multi-stage water inlet process of sewage treatment by analyzing the relationship between OUR and AHRT and optimally regulating and controlling the AHRT.
Background
At present, most of municipal domestic sewage in China is sewage with a low C/N ratio, and the traditional activated sludge method is usually careless in treating the sewage with the low C/N ratio, and has the problems of insufficient carbon source, complex operation and adjustment, high cost and the like.
Many scholars propose various improved processes for solving the problem of insufficient carbon source in sewage plants. The carbon source is optimized and utilized, and the nitrogen and phosphorus removal is simultaneously completed and efficiently removed. However, due to the complex process adjustment parameters, the optimal parameters under different water inlet conditions of different multi-stage water inlet processes cannot be known, and great difficulty exists in the actual implementation of sewage treatment plants. Therefore, a method for accurately and efficiently obtaining an optimal area by using the OUR and the AHRT and simply adjusting the working conditions by using the AHRT becomes a technical problem to be solved urgently at present.
Disclosure of Invention
In order to solve the above-mentioned defects in the prior art, the present invention aims to provide a method for obtaining an optimal working condition area by using process parameters and controlling the change of operation parameters to perform optimal regulation and control. In different multistage water inflow processes, distribution areas under different working conditions are obtained by analyzing the relationship between the OUR and the AHRT, optimal areas are found, and the OURc and the OURn are influenced by regulating and controlling the size of the AHRT, so that optimal regulation is performed, and the method can be used for optimal regulation and control of a complex multistage water inflow process.
The invention is realized by the following technical scheme.
A method for determining an optimal area and adjusting a multi-stage water inlet process for sewage treatment comprises the following steps:
1) taking sewage plant activated sludge which is not treated;
2) the method comprises the following steps of (1) carrying out respiratory map test on activated sludge of a sewage plant to respectively obtain 5 oxygen consumption rates: current oxygen consumption rate OURs, quasi-endogenous oxygen consumption rate OURq, endogenous oxygen consumption rate OURe, nitrogen source added oxygen consumption rate OURen and total oxygen consumption rate OURenc;
3) determining the minimum AHRT value of the non-aerobic hydraulic retention time AHRT in different sewage treatment multi-stage water inlet processesminMinimum oxygen consumption rate OURc of heterotrophic bacteriaminAnd minimum value OURn of oxygen consumption rate of autotrophic bacteriamin；
4) Taking the non-aerobic hydraulic retention time AHRT as an X axis, and taking the heterotrophic bacteria oxygen consumption rate OURc and the autotrophic bacteria oxygen consumption rate OURn as Y axes respectively, and using the Y axes as graph software to produce a relational graph;
5) according to the minimum AHRT value of the non-aerobic hydraulic retention time AHRTminMinimum oxygen consumption rate OURc of heterotrophic bacteriaminAnd minimum value OURn of oxygen consumption rate of autotrophic bacteriaminThe curve divides the relational graph into different areas;
6) the area satisfying the following conditions is an optimal area for sewage treatment:
satisfy AHRT at the same time>AHRTmin、OURc>OURcmin、OURn>OURnminThe area of (a);
7) by controlling the change of the non-aerobic hydraulic retention time AHRT in the process, the oxygen consumption rate OURc of heterotrophic bacteria and the oxygen consumption rate OURn of autotrophic bacteria are adjusted to be close to the optimal area.
Further, in the step 2), the specific process of the breath pattern test is as follows:
taking 0.3L of sludge in an aeration tank of a sewage plant, diluting the sludge to 1.2L by using tap water, and measuring field OURs; then stirring the sludge sample for 15s, precipitating for 10min, removing supernatant, fixing the volume to 0.6L, washing the sludge for 3 times by using buffer solution PBS, and measuring the quasi-endogenous OURq of the sludge; then, the mixed liquid of the activated sludge in the reactor is subjected to constant volume to 1.2L by tap water, the internal source OURe is measured by aerating a sludge sample for 2h, 50g/L of ammonium chloride is added to measure OURen which is OURe + OURn, and finally 200g/L of anhydrous sodium acetate is added to ensure that the substrate is sufficient, and the total respiration rate OURenc which is OURe + OURc + OURn is measured.
Further, the OURcminThe minimum oxygen consumption rate of heterotrophic bacteria meeting the growth and increment of the activated sludge; OURnminIs the minimum value of the oxygen consumption rate of the autotrophic bacteria when the process meets the minimum denitrification requirement; AHRTminRepresents the lowest non-aerobic hydraulic retention time that satisfies the rational utilization of COD in anaerobic and anoxic zones.
Furthermore, the non-aerobic hydraulic retention time AHRT in the process is controlled by adjusting the water inflow, the reflux and the tank capacity.
The invention has the following advantages:
1) the method is rapid and accurate, and finds out the optimal operating interval of the working conditions of the multi-section water inlet process.
Based on the determination of the process parameters OUR and AHRT, the optimal working condition area of the process can be rapidly and accurately judged, and the deviated working condition is subjected to process regulation and control.
2) The regulation and control mode is simple and quick.
The AHRT is changed by regulating and controlling the operation parameters of the process, so that the AHRT is adjusted to the optimal working condition area.
3) Economical and practical, and wide application range.
The invention can relieve the problem of insufficient carbon source in the sewage plant, enables the multi-stage water inlet process in sewage treatment to efficiently utilize the carbon source, simultaneously completes denitrification and dephosphorization and simultaneously removes the carbon source efficiently, and is economic and effective.
The invention is suitable for a multi-stage water inlet process in most running sewage treatment, can flexibly adjust the water inlet ratio, the reflux ratio and the tank capacity according to the change of water inlet amount, water quality characteristics and environmental conditions to achieve the optimal working condition, and is a method for effectively helping the management and the running of a sewage plant.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a schematic diagram of the MAAO process;
figure 2 is a MAAO process parameter plot.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
The invention discloses a method for determining an optimal region and adjusting a multi-stage water inlet process for sewage treatment, which comprises the following steps:
1) taking sewage plant activated sludge which is not treated;
2) the method comprises the following steps of (1) carrying out respiratory map test on activated sludge of a sewage plant to respectively obtain 5 oxygen consumption rates: current oxygen consumption rate OURs, quasi-endogenous oxygen consumption rate OURq, endogenous oxygen consumption rate OURe, nitrogen source added oxygen consumption rate OURen and total oxygen consumption rate OURenc;
the specific process of the respiratory atlas test is as follows:
taking 0.3L of sludge in an aeration tank of a sewage plant, diluting the sludge to 1.2L by using tap water, and measuring field OURs; then stirring the sludge sample for 15s, precipitating for 10min, removing supernatant, fixing the volume to 0.6L, washing the sludge for 3 times by using buffer solution PBS, and measuring the quasi-endogenous OURq of the sludge; then, the mixed liquid of the activated sludge in the reactor is subjected to constant volume to 1.2L by tap water, the internal source OURe is measured by aerating a sludge sample for 2h, 50g/L of ammonium chloride is added to measure OURen which is OURe + OURn, and finally 200g/L of anhydrous sodium acetate is added to ensure that the substrate is sufficient, and the total respiration rate OURenc which is OURe + OURc + OURn is measured.
3) Determining the minimum value of non-Aerobic Hydraulic Retention Time (AHRT) in multi-stage water inlet process in different sewage treatmentmin)、OURcmin、OURnmin(ii) a Wherein, OURcminThe minimum oxygen consumption rate of heterotrophic bacteria meeting the growth and increment of the activated sludge; OURnminIs the minimum value of the oxygen consumption rate of the autotrophic bacteria when the process meets the minimum denitrification requirement; AHRTminRepresents the lowest non-aerobic hydraulic retention time that satisfies the rational utilization of COD in anaerobic and anoxic zones.
4) Taking AHRT as an X axis and OURc and OURn as Y axes respectively, and using the AHRT as graph software to produce a relational graph;
5) according to AHRTmin、OURcminAnd OURnminThe curve divides the relational graph into different areas;
6) the area satisfying the following conditions is an optimal area for sewage treatment:
satisfy AHRT at the same time>AHRTmin、OURc>OURcmin、OURn>OURnminThe area of (a);
7) and the OURc and the OURn are adjusted to be close to the optimal area by controlling the change of the AHRT in the process so as to influence the OURc and the OURn.
The method for regulating and controlling the non-aerobic hydraulic retention time AHRT in the process specifically comprises the following steps: adjusting the water inflow, the reflux and the tank capacity.
The effects of the present invention will be further described below by way of specific examples.
Example MAAO process application is shown in figure 1.
1) Sampling sludge from an aeration tank of a Shanxi MAAO process sewage treatment plant;
2) an intelligent WBM400 sewage treatment operating workstation provided by Xian Green Standard Water environmental technologies, Inc. is selected as an instrument for detecting sludge OUR. Taking 0.3L of sludge in an aeration tank of a sewage plant, diluting the sludge to 1.2L by using tap water, and measuring field OURs; then stirring a sludge sample for 15s, precipitating for 10min, removing supernatant, fixing the volume to 0.6L, washing the sludge for 3 times by using buffer solution (PBS), and measuring the quasi-endogenous OURq of the sludge; then, using tap water to fix the volume of the activated sludge mixed liquid in the reactor to 1.2L, aerating a sludge sample for 2h to determine the internal source OURe, adding 50g/L ammonium chloride to determine OURen which is OURe + OURn, and finally adding 200g/L anhydrous sodium acetate to ensure that the matrix is sufficient, and determining the total respiration rate OURenc which is OURe + OURc + OURn; 5 oxygen consumption rates were obtained: current oxygen consumption rate OURs, quasi-endogenous oxygen consumption rate OURq, endogenous oxygen consumption rate OURe, nitrogen source added oxygen consumption rate OURen and total oxygen consumption rate OURenc;
3) determination of AHRT in MAAO treatment Processmin、OURcminAnd OURnminThe value of the parameter. OURCminA value of 0.24mgO2·L-1·min-1，OURnminA value of 0.12mgO2·L-1·min-1，AHRTminThe larger the process is, the better the process is, in the general MAAO process, the COD can be reasonably utilized when the minimum consumption of the COD in a non-aerobic zone is more than 60%. AHRT is selected at this timeminThe value was 95.8 min.
4) Using AHRT as X axis, using OURc and OURn as Y axis, respectively, as graph software to make a relation graph, and dividing into different regions, as shown in FIG. 2;
5) according to AHRTmin、OURcminAnd OURnminThe curve divides the relational graph into different areas;
6) as can be seen from FIG. 2, the ① area is an optimal area, wherein AHRT is large, which can achieve a large amount of COD removal under anaerobic and anoxic conditions, OURc is small on the basis of satisfying self growth and proliferation, which does not compete with autotrophic bacteria, OURn is large which can achieve high denitrification efficiency, so the area satisfying the following conditions is an optimal area for sewage treatment, which simultaneously satisfies AHRT>AHRTmin、OURc>OURcmin、OURn>OURnminThe area of (a);
7) and the OURc and the OURn are influenced by controlling the change of the AHRT in the process, and the proximity of the OURc and the OURn to an optimal area is adjusted. The method for regulating and controlling AHRT specifically comprises the following steps: adjusting the water inflow, the reflux and the tank capacity.
Example analysis:
we can find that the size and position of each region are determined by the respiratory map parameters of different regions and the characteristics of MAAO process performance represented by AHRT under the existing fixed water quality condition. FIG. 2 is divided into 6 regions, each region being defined by AHRTmin、OURcminAnd OURnminAnd (4) distinguishing.
① area is a reasonable area under the existing water quality condition, AHRT is large, which can complete the goal of COD large consumption in anaerobic anoxic area, OURc is not small, which can complete the growth value-added requirement of sludge, OURn is large, which can complete denitrification requirement, the working condition is working condition one and working condition two, in this area, AHRT and OURn are bigger, the denitrification capability of the system is higher, ① area simultaneously satisfies AHRT>AHRTmin、OURc>OURcmin、OURn>OURnminThe region (2) is an optimal region.
②, the AHRT is too short to complete the reasonable COD configuration, and the aerobic pool consumes certain COD, at this time, the OURc is too large, the OURn is too small, the denitrification effect is very poor, representing the working condition three and the working condition four, the ③ area and the ④ area are different partitions under the ② area, and are both AHRT too small and OURc too large, but the OURn of the ③ area is higher and meets certain denitrification requirement, while the OURn of the ④ area is lower and the denitrification efficiency is lower, at this time, the most effective adjusting method is to increase the AHRT by reducing the water inflow or increasing the pool volume, so that the AHRT reaches the optimal area;
the AHRT in the ⑤ # area is larger, but the OURc or OURn is very small, which generally cannot happen;
⑥, the OURn also meets the requirement of denitrification, but the AHRT is especially large, because the sludge has different energy conversion efficiency under anaerobic anoxic and aerobic conditions, the OURc requirement is required to be certain when the sludge completes necessary growth and proliferation, and the OURc in the area is too small, which is unfavorable for the sludge growth, and the representative working condition of the situation is working condition five.
The MAAO process operating condition table and the operating parameters are shown in table 1.
TABLE 1 MAAO Process operating conditions Table and operating parameters
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (2)
1. A method for determining an optimal area and adjusting a multi-stage water inlet process for sewage treatment is characterized by comprising the following steps:
1) taking sewage plant activated sludge which is not treated;
2) the method comprises the following steps of (1) carrying out respiratory map test on activated sludge of a sewage plant to respectively obtain 5 oxygen consumption rates: current oxygen consumption rate OURs, quasi-endogenous oxygen consumption rate OURq, endogenous oxygen consumption rate OURe, nitrogen source added oxygen consumption rate OURen and total oxygen consumption rate OURenc;
3) determining the minimum AHRT value of the non-aerobic hydraulic retention time AHRT in different multi-section water inlet processesminMinimum oxygen consumption rate OURc of heterotrophic bacteriaminAnd minimum value OURn of oxygen consumption rate of autotrophic bacteriamin；
4) Taking the non-aerobic hydraulic retention time AHRT as an X axis, and taking the heterotrophic bacteria oxygen consumption rate OURc and the autotrophic bacteria oxygen consumption rate OURn as Y axes respectively, and using the Y axes as graph software to produce a relational graph;
5) according to the minimum AHRT value of the non-aerobic hydraulic retention time AHRTminMinimum oxygen consumption rate OURc of heterotrophic bacteriaminAnd minimum value OURn of oxygen consumption rate of autotrophic bacteriaminThe curve divides the relational graph into different areas;
6) the area satisfying the following conditions is an optimal area for sewage treatment:
satisfy AHRT at the same time>AHRTmin、OURc>OURcmin、OURn>OURnminThe area of (a);
7) adjusting the oxygen consumption rate OURc of heterotrophic bacteria and the oxygen consumption rate OURn of autotrophic bacteria to approach to an optimal area by controlling the change of the non-aerobic hydraulic retention time AHRT in the process;
in the step 2), the specific process of the breath atlas test is as follows:
taking 0.3L of sludge in an aeration tank of a sewage plant, diluting the sludge to 1.2L by using tap water, and measuring field OURs; then stirring the sludge sample for 15s, precipitating for 10min, removing supernatant, fixing the volume to 0.6L, washing the sludge for 3 times by using buffer solution PBS, and measuring the quasi-endogenous OURq of the sludge; then, using tap water to fix the volume of the activated sludge mixed liquid in the reactor to 1.2L, aerating a sludge sample for 2h to determine the internal source OURe, adding 50g/L ammonium chloride to determine OURen which is OURe + OURn, and finally adding 200g/L anhydrous sodium acetate to ensure that the matrix is sufficient, and determining the total respiration rate OURenc which is OURe + OURc + OURn;
the OURcminThe minimum oxygen consumption rate of heterotrophic bacteria meeting the growth and increment of the activated sludge; OURnminThe minimum oxygen consumption rate of autotrophic bacteria when the process meets the minimum denitrification requirement in the national effluent standard; AHRTminRepresents the lowest non-aerobic hydraulic retention time that satisfies the rational utilization of COD in anaerobic and anoxic zones.
2. The method of claim 1, wherein the non-aerobic hydraulic retention time AHRT is controlled by adjusting the water inflow, reflux and pond capacity.
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| CN113571137A (en) * | 2021-06-25 | 2021-10-29 | 上海环境卫生工程设计院有限公司 | Method for determining influence of environmental pH value on heterotrophic bacteria activity by adopting mathematical model |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1492624A (en) * | 1975-03-19 | 1977-11-23 | Atlas Copco Ab | Inhibiting sedimentation in water |
| US6485647B1 (en) * | 1999-03-17 | 2002-11-26 | David A. Potts | Method and apparatus for treating leach fields |
| CN104914213A (en) * | 2015-05-13 | 2015-09-16 | 西安建筑科技大学 | Method for early warning of activated sludge filamentous bacterium expansion |
| CN105699601A (en) * | 2016-03-16 | 2016-06-22 | 西安建筑科技大学 | Method for determining activated sludge treatment capacity |
| CN106745822A (en) * | 2017-02-23 | 2017-05-31 | 西安建筑科技大学 | It is a kind of that method of the active sludge microorganism dormancy with being lost in is differentiated based on breathing collection of illustrative plates |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1492624A (en) * | 1975-03-19 | 1977-11-23 | Atlas Copco Ab | Inhibiting sedimentation in water |
| US6485647B1 (en) * | 1999-03-17 | 2002-11-26 | David A. Potts | Method and apparatus for treating leach fields |
| CN104914213A (en) * | 2015-05-13 | 2015-09-16 | 西安建筑科技大学 | Method for early warning of activated sludge filamentous bacterium expansion |
| CN105699601A (en) * | 2016-03-16 | 2016-06-22 | 西安建筑科技大学 | Method for determining activated sludge treatment capacity |
| CN106745822A (en) * | 2017-02-23 | 2017-05-31 | 西安建筑科技大学 | It is a kind of that method of the active sludge microorganism dormancy with being lost in is differentiated based on breathing collection of illustrative plates |
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